What is Fresh Air System

In pursuit of health and ease the quality of life, 70 years ago in European countries a simple and practical system was built at the historic moment, 90% of their buildings were installed this system, at present, it has been widespread in a lot of situations, that's the central fresh air system.

The system continuously for the whole house 24 hours a day by circulating the air from indoor and outdoor, it is an air exchange system to ensure the quality of indoor air conditions.

To ensure the indoor always have the fresh air, so it's called "houses of the respiratory system".